we are doing now has never been done before.A. ThatB. WhatC. WhichD. Whether

发布时间：2020-08-17 13:29:56

     we are doing now has never been done before.
A. That
B. What
C. Which
D. Whether

网友回答

A. That
(答案→)B. What
C. Which
D. Whether
解析：句中的主语从句由连接代词引导，句意为“我们现在正在做前人从未做过的事”。
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